CS583 – Data Mining and Text Mining

CS583, Bing Liu, UIC 2 General Information Instructor: Bing Liu   Tel: (312) (Google Voice)  Office: SEO 931 Lecture time slots:  Tuesday & Thursday Room: A3 LC Office hours: 2:00pm-3:30pm, Tuesday & Thursday (or by appointment)

CS583, Bing Liu, UIC 3 Course structure The course has two parts:  Lectures - Introduction to the main topics  Two projects (done in groups) 1 programming project. 1 research project. Lecture slides will be made available on the course web page.

CS583, Bing Liu, UIC 4 Grading Final Exam: 40% Midterm: 30%  1 midterm Projects: 30%  1 programming (15%).  1 research assignment (15%)

CS583, Bing Liu, UIC 5 Prerequisites Knowledge of  basic probability theory  algorithms

CS583, Bing Liu, UIC 6 Teaching materials Required Text  Web Data Mining : Exploring Hyperlinks, Contents and Usage data. By Bing Liu, Springer, ISBN References:  Data mining: Concepts and Techniques, by Jiawei Han and Micheline Kamber, Morgan Kaufmann, ISBN  Principles of Data Mining, by David Hand, Heikki Mannila, Padhraic Smyth, The MIT Press, ISBN X.  Introduction to Data Mining, by Pang-Ning Tan, Michael Steinbach, and Vipin Kumar, Pearson/Addison Wesley, ISBN  Machine Learning, by Tom M. Mitchell, McGraw-Hill, ISBN

CS583, Bing Liu, UIC 7 Topics Introduction Data pre-processing Association rules and sequential patterns Classification (supervised learning) Clustering (unsupervised learning) Post-processing of data mining results Text mining Partially (semi-) supervised learning Opinion mining and summarization Link analysis Introduction to Web mining

CS583, Bing Liu, UIC 8 Project assignments Done in groups: each group has ? Students Project 1: Implementation  Implementing an algorithm Project 2: Research project  Publishable research, not just a simple exercise  Topics will be given later.

A research project example (Spring 2010) Gender Classification of Blog Posts  To predict whether the author of a blog post is male or female. A research paper has just been accepted for publication by EMNLP-2010 (a leading NLP conference)  Title: Improving gender classification of blog authors  By Arjun Mukherjee and Bing Liu Arjun will share his work & experience in the class Aug 31. Hope some of you can do the same!!! CS583, Bing Liu, UIC 9

10 Feedback and suggestions Your feedback and suggestions are most welcome!  I need it to adapt the course to your needs.  Let me know if you find any errors in the textbook. Share your questions and concerns with the class – very likely others may have the same. No pain no gain  The more you put in, the more you get  Your grades are proportional to your efforts.

CS583, Bing Liu, UIC 11 Rules and Policies Statute of limitations: No grading questions or complaints, no matter how justified, will be listened to one week after the item in question has been returned. Cheating: Cheating will not be tolerated. All work you submitted must be entirely your own. Any suspicious similarities between students' work will be recorded and brought to the attention of the Dean. The MINIMUM penalty for any student found cheating will be to receive a 0 for the item in question, and dropping your final course grade one letter. The MAXIMUM penalty will be expulsion from the University. Late assignments: Late assignments will not, in general, be accepted. They will never be accepted if the student has not made special arrangements with me at least one day before the assignment is due. If a late assignment is accepted it is subject to a reduction in score as a late penalty.

Introduction to the course

CS583, Bing Liu, UIC 13 What is data mining? Data mining is also called knowledge discovery and data mining (KDD) Data mining is  extraction of useful patterns from data sources, e.g., databases, texts, web, images, etc. Patterns must be:  valid, novel, potentially useful, understandable

CS583, Bing Liu, UIC 14 Classic data mining tasks Classification: mining patterns that can classify future (new) data into known classes. Association rule mining mining any rule of the form X  Y, where X and Y are sets of data items. E.g., Cheese, Milk  Bread [sup =5%, confid=80%] Clustering identifying a set of similarity groups in the data

CS583, Bing Liu, UIC 15 Classic data mining tasks (contd) Sequential pattern mining: A sequential rule: A  B, says that event A will be immediately followed by event B with a certain confidence Deviation detection: discovering the most significant changes in data Data visualization: using graphical methods to show patterns in data.

CS583, Bing Liu, UIC 16 Why is data mining important? Computerization of businesses produce huge amount of data  How to make best use of data?  Knowledge discovered from data can be used for competitive advantage. Online e-businesses are generate even larger data sets  Online retailers (e.g., amazon.com) are largely driving by data mining.  Web search engines are information retrieval (text mining) and data mining companies

CS583, Bing Liu, UIC 17 Why is data mining necessary? Make use of your data assets There is a big gap from stored data to knowledge; and the transition won’t occur automatically. Many interesting things that one wants to find cannot be found using database queries “find people likely to buy my products” “Who are likely to respond to my promotion” “Which movies should be recommended to each customer?”

CS583, Bing Liu, UIC 18 Why data mining? The data is abundant. The computing power is not an issue. Data mining tools are available The competitive pressure is very strong.  Almost every company is doing (or has to do) it

CS583, Bing Liu, UIC 19 Related fields Data mining is an multi-disciplinary field: Machine learning Statistics Databases Information retrieval Visualization Natural language processing etc.

CS583, Bing Liu, UIC 20 Data mining (KDD) process Understand the application domain Identify data sources and select target data Pre-processing: cleaning, attribute selection, etc Data mining to extract patterns or models Post-processing: identifying interesting or useful patterns/knowledge Incorporate patterns/knowledge in real world tasks

CS583, Bing Liu, UIC 21 Data mining applications Marketing, customer profiling and retention, identifying potential customers, market segmentation. Engineering: identify causes of problems in products. Scientific data analysis, e.g., bioinformatics Fraud detection: identifying credit card fraud, intrusion detection. Text and web: a huge number of applications … Any application that involves a large amount of data …

CS583, Bing Liu, UIC 22 Text mining Data mining on text  Due to online texts on the Web and other sources  Text contains a huge amount of information of almost any imaginable type!  A major direction and tremendous opportunity! Main topics  Text classification and clustering  Information retrieval  Information extraction  Opinion mining or sentiment analysis

CS583, Bing Liu, UIC 23 Resources ACM SIGKDD Data mining related conferences  Data mining: KDD, ICDM, SDM, …  Databases: SIGMOD, VLDB, ICDE, …  AI: AAAI, IJCAI, ICML, ACL, EMNLP, …  Web: WWW, WSDM, …  Information retrieval: SIGIR, CIKM, … Kdnuggets:  News and resources. You can sign-up! Our text and reference books